/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.polardbx.util;

import java.util.function.Supplier;

public class ValueHolder<T> {
    private boolean inited = false;
    private T value = null;

    public T getOrElse(Supplier<T> provider) {
        if (inited) {
            return value;
        } else {
            return provider.get();
        }
    }

    public void set(T value) {
        this.inited = true;
        this.value = value;
    }
}
